The main purpose here is to assign the meaning to the crystals that we use in them as we focus on them and their purpose with our pure intent. It is best that we create them in a meditative (peaceful) state of awareness, while completely unplugged and Source infused. If possible, we are to completely surrender to the whole process of their creation. This way, we are creating them through pure Source energy and Divine logic. This way, their power is stronger and they can emanate more pure Light of Source, because our thoughts are clearer and our Heart is purer. The size of the crystals does not matter, and they can also include other natural objects such as stones, wood, seashells, etc. We just have to allow our Divine intuition to lead the way in this process!"
And don't forget to recharge all of your crystal companions out on the air and sunlight from time to time, and every Full moon, Solstice, or other important Galactic/Grand alignment! They feed/source of the same Divine Light as we do ... we are One!